The document summarizes several key changes between the DSM-IV and DSM-5 diagnostic criteria. Some notable changes include: replacing terms like "mental retardation" with "intellectual disability"; combining several language and learning disorders; modifying the criteria for autism spectrum disorder, ADHD, and schizophrenia; and standardizing criteria for tic disorders and catatonia across different conditions. Dimensional assessments are also introduced in the DSM-5 to better characterize symptom severity and heterogeneity in disorders.